The L9637 is a monolithic integrated circuit containing standard ISO 9141 compatible interface functions.

Defined OFF output status in undervoltage condition and V_S or GND interruption

K output current limitation, typ. I_K = 60 mA

High input impedance for open V_S or GND connection

Controlled output slope for low EMI

Defined K output OFF for TX input open

Defined output ON status of LO or RX for open LI or K inputs

EMI robustness optimized

Integrated pull up resistors for TX, RX and LO

Overtemperature shut down function Selective to K-I/O pin

Bidirectional K-I/O pin with supply voltage dependent input threshold

Operating power supply voltage range 4.5 V ≤ V_S ≤ 36 V (40 V for transients)

Standby mode with very low current consumption IS_SB ≤ 1 mA @ V_CC ≤ 0.5 V

Reverse supply (battery) protected down to V_S ≥ -24 V

TTL compatible TX input

Wide input and output voltage range -24 V ≤ V_K ≤ V_S

Low quiescent current in off condition ISOFF = 120 µA